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SEGMENT INFORMATION - Each product or service (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenues generated from each product |  |  |
Total net revenues | $ 3,744,512 | $ 3,390,393 | $ 2,853,078
Module | Solar modules and other solar power products |  |  |
Revenues generated from each product |  |  |
Total net revenues | 1,930,701 | 2,551,509 | 2,573,685
Module | Solar system kits |  |  |
Revenues generated from each product |  |  |
Total net revenues | 93,253 | 84,598 | 86,794
Module | EPC services |  |  |
Revenues generated from each product |  |  |
Total net revenues | 62,408 |  |
Module | O&M services |  |  |
Revenues generated from each product |  |  |
Total net revenues | 10,767 | 6,938 | 4,128
Module | Others ( materials) |  |  |
Revenues generated from each product |  |  |
Total net revenues | 71,789 | 69,878 | 82,039
Energy | Solar power projects |  |  |
Revenues generated from each product |  |  |
Total net revenues | 1,542,906 | 632,256 | 22,665
Energy | Electricity |  |  |
Revenues generated from each product |  |  |
Total net revenues | 8,735 | 29,236 | 68,789
Energy | Others (EPC and development services) |  |  |
Revenues generated from each product |  |  |
Total net revenues | $ 23,953 | $ 15,978 | $ 14,978

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